Tooth structure.



redatte,

To all whom it may animera.'- i' Beit known that I, lsADonn A.-Errs'rnm, a citizen of the United States,

rs wenn a. nrrs'rnrnr, or rompo, onto.

\ 1 me a and a resident of Toledo, in the count of 'Lucas and State ofOhio, have invente .a lcertain new land useful Tooth Structure andA lfdo hereby de'- clare the following to lbe --a' full, clear, and exactdescription of the invention, such as will enable others skilled intheart to which it appertains to make and use the same, referencebeing'had to the accompanying drawmarked thereon,

l at

- designates a tooth body hay-in llh die

lowing speciiication, and while, in its broader aspect,it is capable ofembodiment .-in nu- -rnerous forms, two embodiments thereof areillustrated in the accompanying. draivilgss;``

Figurel` is alongitudinalsection of a gold' 'l trim the same.

crowned tooth embodying my invention, and

Fig. 2'is a similar sectionof a porcelain* Logan crown embodyingtheinvention.-l

Referring to llig. l of the drawings, l

a gold crown 2 -mounted thereon, and t e facing, in

which my invention resides and which may; lloe placed on the frontexposed portion of the tooth or at any other 4peint thereon, com-vrises, in the present instance, an enamel 1| ody coat 3, a paint coatall tov give the enamel 3 the appearance of a natural. tooth, or topreferably match the adjoining tooth, and a transparent 'surfaceenamelcoat' 5.

.The enamel coat 3, which may be applied l to a natural orporcelaintooth; as well 'as to.

ti'onlas that-of 4 ythe peroxid of-tin orlead, fw te t 'are carried instock by,

a goldcrown, comprises awhite .or-opaqge silica-or crystal glassenamelwhichlin t e form generally' used a "comprises i silica 1130 sodallt-pa, salt' an `amount substantially equalto-the: weight-rlp" Thetrsparent enamelfj" comprisesy thegfsame composi-' j the lthel parts,antimoniate of peter 1 part,

of the silica used: 5 preferably they body enel ence t that 'Mhrenersthe enamel opaque,`is @mit nucrnnn.

peoiiicatloii of Lettere Patent. Application tiled July 5,1917. Seria-1Nai'lt'il;

' porcelain paint fdierent dealers.

. enamel porcelain,-

'an exceedingly `mar applied.' The crown is then removed and l a pieceof gold 8 burnished" upon lthe en oecd end of the root.

are usually .'iobtained-in lump form, kthe opa ue enamel being orderedunder lthe name white enamel and the transparent enamel being usuallyordered under the name of fondant enamel. that the ingredients: andproportions thereof of these enamelsvary somewhat for diderent dealers,butI thefingredients and proportions.

above mentioned are substantially f those which are more generally used.'lt ifs to be Patented-dpr, hdmi,

llt is found in lpractice underaood, however, that these mgreaients fand the proportions mentioned may be varied considerably withoutdeparting from the spirit of the invention. The paint employed for thecolor coating 4c is ter f ln facing. a tooth embodying my -inwention,the method referabl stantiall as .fol ows: enamele whether such surfacecomprises ldor other material,

isl preferably scratc ed or roughened retention purposes and ,afterbeing cleaned a coat of opaqueenamel 3 in Vpaste form is 4 applied. Thearticle v is .te

then heated toY fuse enamel, and -aftereooling the halted enamel bodycoat 3 is ground' o r polished tov i color coat l 'iaithen Athepgenelbody coat the y 1 'Th applied to give desired'oolor and the article isagain heated OBQ bals n beenobtained the color a coat of transparentenamel 5 and the article then heated: to ybake 4the 'same.

spends in or teethupon w nch'or neat vto which the enamel is pld. Tobuild up a porce 2) iis iirstsha edso that the b uccal gin fits t exroot'i' tofwhlch, it is to be ,di` small quantity of ody or'opaque enamelisthenfapplied ina erous lump'tolthe .'nnerend of theporceain crown owhere it adidas" the root and the `enel s prestare end :fo ai 1d)y andthe cro.' the crown i te.. tharielhtliw.

This havin been and can be obtained *from practised ie sub e' `surfaceto loe for the .feminine rm f 9, [The crown fis then placed inpos'itionon i reads out under ayer il@ betwi` ne' withv the enamel 'an fg `of such color coat. en o the desired color has f coat iscoyercd 'withThis procedure results in fliard enamel, `which correcolor andappearanceto' the tooth hh.

.brown/in a mairij ner embodying the inven ion thecrown (Eigiet i 4movedfrom the mouth and baked. Should thus described my invention, what I Y:any of the enamel be exposed itmay be I clalm as new and vdesire tosecure by Let- 20' detail the method employed in facing or over thecolor coat.

broughtV to proper c0101` by applying a color ters'Patent is coat and-van outer transparent enamel coat 1. A tooth having a fused surfacecoatin to the exposed surface. of silica enamel, a color coat for saidename While I havedescribed with more or less and a fused transparentsilica enamel coat b uilding up a tooth-embodying my inve'n- 2.' A toothhaving an opaque'silivca enamel t1on, no claim is made in' the presentapplicoat fused thereon, said enamel comprising cation' for the processby whichthe article silica, antimoniate of 'A soda,r salt-peter and 1smade, claims for the process being reserved peroxid of metal insubstantially the roporfor another application. l tions described,` aCporcelain paint co or coat 30 V I wish it understood that my inventiondeposited over sai enamel coat, anda transis not limited to; anyspecific construction, .parent silica enamel coat fused on the colorarrangement, f form or proportion of the coat. v l' parts, as it iscapable ofnumerous -modiiica- In. testimony whereof, I have hereuntotions and changes withoutdeparting from' signed my name to/thisspecification the spirit ofthe claims. ISADORE A. EPPSTEIN.

